fix: restrict deploy workflow to manual trigger only

Remove push trigger to prevent automatic resource provisioning.
The workflow now only runs via workflow_dispatch.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Yamini-Microsoft

.github/workflows/azure-dev.yml

@@ -1,15 +1,6 @@
 name: Azure Dev Deploy
 on:
   workflow_dispatch:
-  push:
-    branches:
-      - main
-    paths:
-      - 'infra/**'
-      - 'azure*.yaml'
-      - '.github/workflows/azure-dev.yml'
-
- 
 permissions:
   contents: read
   id-token: write